Look at -db graph_matrix- and observe that the -by- tab has no "Subgraph
axes" button; which makes me think that it does not respect -norescale-.
Compare that to -db histogram- where said button is present.

All of which we could call -graph matrix-`s prerogative if it was not for
the fact that its help points the user to -help by_option- which does
include the -rescale- options...